Tacho/Speedo Connector Removal Tips?

Under the wiring in the middle of the plug there is a retainer clip type single !Tang! arrangement. Push that plastic Tang bit down towards the plug itself and gently wiggle and pull back at the same time and it will release. it took me a while to work this out. Its a !Tang! that grabs the gauge cluster. I had to change a bulb in the dash and its not the most fun job due to lack of room. Slowly/gently does it Regards Paul

 

The plug should easily come off when you depress the little button thing leaving the plastic instrument housing AND the floppy circuit board behind. I'm guessing you have enough corrosion there that they are stuck together. I would break out the miracle potions like P B Blaster, contact cleaners, WD40 etc and see if any of those along with careful dissection will break them apart. If it gets mangled instead you could probably carefully solder small wires to each copper track on the circuit board and hook them up the the wires from the harness and just bypass that plug

 

If you first remove the connector with the shortest cable (I forgot which one, but I think on the left side) , then you can turn the whole panel for a better view on the back side.
That first connector was a normal one, not the 2 coloured one (in my case).
Anyway, do not pull hard on the connectors, what Qavion says, it is a question of seeing the trick (tang)